Rotary pump for gas-producing apparatus.



C. S. McFARLANE.

ROTARY PUMP FOR GAS PRODUCING APPARATUS. APPLICATION FILED JAN. 12, 1912.

1,153,235. PatentedSept. 14,1915.

l A u m m u I IAHAhII!!! WITNESSES- J 4 g W aflk'rifi'wamaw BY Q COLUMBIA PLANOGRAPH CDuWASHlNOTON, D. c.

ROTARY PUMP r03 eas-rnonucine APPARATUS.

To all whom it may concern Be it known that I, GHARLEs SEXMQUR MCF RLANE, subject of the King of Great Britain, residing at 24: Swanson street, Auckland, in the Dominion of NewZealand, have invented new and useful Improvements in Rotary Pumps for Gas-Producing Apparatus, of which the following is a specification.

This invention relates 'to apparatus for the production of gas in the form of carbureted air for heating and illuminating purposes by mixing petrol or other volatile hydrocarbon oils with air in the correct relative proportions. v

The invention refers to apparatus of that class in which the power necessary for operating the mechanical feeding devices is derived from the gradual falling of a weight, such operation being so governed by the apparatus that it will respond to the demands made upon the gas supply and automatically commence or suspend production.

The object of the present invention is the provision of a simple and reliable apparatus of this nature in which special means are provided to maintain a constant and regular supply of oil in the correct relative =proportion to that of the air irrespective of the consumption while by means of a specially devised carbureter a thorough evaporation of oil is attained.v

In order that the nature of the invention and its construction may be fully understood, reference will now be made to the accompanying sheet of drawings in which Figure l is a sectional elevationillustrating the apparatus as a whole.v Fig. 2 is a sectional elevation of the pump wheel; Fig. 3- is a detail view ofthe oil elevator, and Fig. 4 isa horizontal'sectional view of the carburetor Showing one of the disks in p ace. 7 V r 1 is a horizontal spindle having a drum or reel 2 upon which is adapted to be'wound a cord 3. One end of the cord?) is attached to the reel 2 while the other end is maintained in tension by means of a suitable weight 4 so that the falling of such. weight will have the effect of rotating the spindle Specification of Letters Patent. Patgnijed Sept, 141', 1 915 ApplicationfiledJanuary 12, [19.12. vse ialno..eaoswz.

1; Asuitable handle or crank 5 is provided to enable the reel to be turned for the purpose of winding the cord while to avoid a reverse rotation ofthe spindle 1 duringsuch winding operation aratchet or free-wheel device may be interposed betweenfsuch ,spintile and the reel 2. f

Keyed upon the spindle 1 so asto be rotated-thereby,-is adrum or wheel 6 adapted to act as a pump to provide the necessary supply ofair. The said wheel which is ;immersed in water to a ,point above its axis (as indicated by the line AA.) comprises a hollow hub or boss .7 provided .at either end with disks or faces 81of suitable diameter. A plurality ofarms or vanes 9, of a width corresponding with the interval between the disks 8 radiate at'equal intervals around the boss 7, while the peripheriesof the disks S-are united by a suitable rim 10 so as to provide a seriesuofpockets ll (see Fig. 2),. Holes or apertures 12 are provided through the rim 10 at the forward portion of each of the said pockets and holes13 are also provfidedto give access-between eacho-f the pockets and the interior ,of the boss. When the wheel is revolved in the proper direction as rlIld-lGZttGd by the arrow, each of theapertures 12 will in turn be carriedihf neath the surface of the water thus preventing the escape of the air which fill ed the pocket whenfsuch was in the uppermost position. As the wheel continues to revolve the pocket becomes more and 11 0 26 submerged and consequently fills wvith water thus expelling theair which passes through theholes 13 into the cavity'of the boss'Z.

The air passes from theboss '7 through the air delivery pipe-14 the entrance of which is arranged within the saidboss at a point above the water-level. I A vent; or ventsl5 are provided to permit of the escape of water from the .boss.

The oil is containedin a reservoir 16from whence it iseonveyed to the ,oil delivery. pipe'l'? by means of the elevator 18.' ,The

said elevator comprisesradisk or ,wheel 19 mounted upon a horizontal axis 20. Upon one side of the disk 19 is formed a ledge V JIlBlliberiZl having. a groovedchannelformed oil chamber 23 which in turn discharges into the oil delivery pipe 17. Instead of a single channel 21 as here shown, the disk may be provided with two or more of such channels each arranged 1n the manner described 7 in order that greater regularity of feed may be obtained. The oil elevator 18 is operated vfrom the main spindle 1 through chain or other suitable gearing 241 in order that the supplies of oil and air may be at all times in the same relative proportions. As the wheel or disk is rotatedin the correct direction, the outer convolutions will collect a certainamount of oil which,.as the turning is continued will gradually flow around in such volute channel until the center is reached, at which point the oil from the innermost convolution flows through the pipe 22 into the duct 23. It will be seen that in this arrangement the oil simply flows by gravity throughout the whole operation, the turning of the disk merely, as it Were, serving to keep the channel in an incline in order that the oil may be caused totravel to the point of discharge at the center.

The mixing chamber or carbureter comprises a vessel 25 of cylindrical or other suitable form into the top of which the oil delivery pipe is introduced while the air delivery pipe enterssuch chamber near the lower end.

Within the vessel 25 are a plurality of disks 26 of such diameter as to fit closely within the walls of such vessel and supported at the desired intervals apart by means of a central rod 27. Each of the I said disks see Fig. 4) is formed with per- 'forations 28 while its periphery is notched or serrated. c

Arran ed around the periphery of each ofthe disks so as to lie within the serrations I is a quantity of calking-cottonor other absorbent material 29 the portions of such material above and below the disks 26 being drawn togetherand bound to the rod 27 thus forming a series of cones as shown in Fig. 1.

The oil enters the chamber from the pipe I 17 and drips upon the perforated dish or plate 30 and thence upon the absorbent ma terial below, while the air entering from the pipe 14 and in passing upward through the saturated material evaporates the oil and so forms the carbureted air which is led off through the supply pipe 31.

By employing a disk, upon one of the side faces of which is carried a spiral ledge having a concave surface throughout upon its side facing inward or toward the center of the disk, the quantity of liquid discharged at the central outlet can never exceed the amount that can be contained within the said concave of the ledge, as instead of compressing, as in the case of rotary pumps, the surplusage of liquid, on reaching the inner convolutions, will drip over the free edge of the ledge and so find its way back into the reservoir. Thus the present device will always supply a definite quantity of liquid for a given speed of rotation irrespective of the depth of its immersion in the reservoir. In addition to this, however, the above action of the device in raising and allowing the liquid to drip back will also serve to agitate such liquid in the reservoir and so prevent it from settling in layers according to the various specific densities of its components as might be the case if such were allowed to remain at rest.

I claim:

1. In an apparatus of the character described, in combination, a liquid reservoir, a vertical member rotatable on a horizontal axis adapted to be partially immersed in the fluid in said reservoir, a coiled grooved member projecting laterally from said rotatable member and movable therewith, and having the convolutions of said grooved member in the same vertical plane, and a conduit associated with the inner end of said coiled groove whereby the liquid in said reservoir is conveyed to said conduit when said rotatable member is actuated, in a constant quantity proportional to the speed of rotation of the grooved member up to the limit of the capacity of the latter and to discharge excess thereof over and into the reservoir as and for the purpose described.

2. An apparatus of the character dc scribed, having in combination, a reservoir adapted to contain fluid, an elevator adapted to convey the fluid therefrom said elevator comprising a single disk mounted to rotate uponahorizontal axis and adapted to bepartially immersed in the fluid in said reservoir, a substantially horizontal ledge mounted on one side of said disk and being formed with a grooved channel, said ledge commencing near the periphery of the disk and continuing in a volute form to a point near the center of said disk with the convolutions of said ledge spaced from each other and in the same vertical plane, fluid conveying means connected with the inner end of said channel for conveying the fluid therefrom.

3. In an apparatus of the character described, in combination, a liquid reservoir, means for feeding the liquid through said reservoir with equal and at a constant pressure and volume comprising a disk partially immersed in said reservoir, arotatable coiled grooved member having the convolutions thereof spaced apart, said convolutions being' disposed substantially horizontally and In testimony whereof I have signed my in the same vertical plane and secured to the name to this specification in the presence of side of said disk, conduit means associated tWo subscribing, Witnesses.

with the inner end of said coiled grooved CHARLES SEYMOUR MOFARLANE. member for conducting the liquid in said WVitnesses:

reservoir therefrom, and means for rotating ETHEL FRANCES COURTNEY,

said disk. SAMUEL EDWIN GREENDALE.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G. 

